22521350213 has 4 divisors (see below), whose sum is σ = 22525688940. Its totient is φ = 22517011488.

The previous prime is 22521350183. The next prime is 22521350251. The reversal of 22521350213 is 31205312522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17694852484 + 4826497729 = 133022^2 + 69473^2 .

It is a cyclic number.

It is not a de Polignac number, because 22521350213 - 2¹² = 22521346117 is a prime.

It is a super-2 number, since 2×22521350213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22521350713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2161568 + ... + 2171961.

It is an arithmetic number, because the mean of its divisors is an integer number (5631422235).

Almost surely, 2^22521350213 is an apocalyptic number.

It is an amenable number.

22521350213 is a deficient number, since it is larger than the sum of its proper divisors (4338727).

22521350213 is an equidigital number, since it uses as much as digits as its factorization.

22521350213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338726.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 22521350213 its reverse (31205312522), we get a palindrome (53726662735).

The spelling of 22521350213 in words is "twenty-two billion, five hundred twenty-one million, three hundred fifty thousand, two hundred thirteen".